Pneumatic-tire protector.



Patented Ian, 7, I902;

No. 690,706. c. a.- nms mom-z.

PNEUMATIC TIRE PROTECTOR. (Applicntioq am Apr; 18, 1991.

(llo Modal.)

WITNESSES: a" 6/ a; v INVENTOH UNITED STATES PATENT OFFICE.

CLARENCE GRAY DINSMORE- OF STAATSBURG,-NEW YORK.

PN EU MATlC-TIRE PROTECTOR.

SPECIFICATION forming part of Letters PatentNo. 690,706, dated January 7,1902.

Application filed April 18. 1901. Serial n5. sates. (No model.)

To all whom it may concern.-

Be it known that I, CLARENCE GRAY Dnvs- MORE,a citizen of the United States,and a resident of Staatsburg, in the county of Dutchess and State of New York, have invented a new and Improved Pneumatic-Tire Protector, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved protector for theinner tube of a double pneumatic tire to prevent the inner tube from being punctured, the protector being designed for use in double-tube tires employed on the wheels of automobiles, bicycles, and other vehicles. 7

The invention consists of novel features and parts and combinations of the same, as willbe fully described hereinafter and then pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts-in all the views.

, Figure 1 is a sectionalside elevation of the improvement as applied." Fig. 2 is an. enlarged transverse section of the same. Fig. 3 is a side elevation of the improvement. .Fig. 4 is an end view of the same, and Fig. '5 is a like view of a modified form of the improvement.

The pneumatic tire consists, essentially, of an outer tube A, an inner tube B, and a protector or shield O, interposed between said tubes A and B, the protector or shield O having a cross section corresponding approximatelyto the outer peripheral half portion of the inner tube B and a corresponding portion of the inner surface of the outer tube A, as will be readily'understood by reference to Fig. 2. The shield O is made of sheet metal and preferably formed in one continuous piece having transverse corrugations C to give the desired rigidity to the protector or shield when applied to the inner surface of the outer tube A, as shown in the drawings. The ends 0 of the shield are plain-that is, not corrugated-and the ends overlap to permit the shield to yield in the direction of its length alongthe middle of the protector or shield to engage the material of the'outer tube A at the inner portion thereof, and thereby assist the flanges O in preventing lateral movement of the protector or shield in the outer tube A.

The flange C may be omitted, as shown in Fig. 5. Instead of making the protector in one single piece it may be made in sections having adjacent ends overlapping.

By the arrangement described the shield 0 forms a protection for the inner inflated tube B, so that in case a nail or other article cuts into and punctures the outer tube A then the shield O prevents said nail or other article from puncturing the inner'tube, and consequently the'tire does not become deflated The outer tube A is open along the inner portion, so as to permit of conveniently inserting the, protector or shield C and the inner tube B.

The corrugations O in addition to giving rigidity to the shield C also prevent longitudinal or creeping movement of the tire, so that no other fastening" means are necessary for holding the protector or shield in place.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 1. A double-tube pneumatic tire having a shield interposed between the outer and inner tube the ends of the shield overlapping and being free to permit the shield to yield in the direction of its length, the said shield being formed with outwardly-extending flanges arranged to embed themselves in the material of the outer tube to hold the shield in place, as set forth.

2. A double-tube pneumatictire having a shield'interposed between the inner tube and the outer tube, the shield being made in one along the middle of the shield to engage the :0 continuous piece arched transversely and material of the outer tube, as set forth. having transverse corrugations, the ends of In testimony whereof I have signed my the shield being free from corrugations and name to this specification in the presence of overlapping, the side edges of the shield havtwo subscribing Witnesses.

ing outwardly-extending flanges adapted to CLARENCE GRAY DINSMORE. embed themselves in the material of the outer Witnesses:

tube, the said shield being also formed with F. W. HANAFORD,

an outwardly-extending V-shaped flange EVERARD B. MARSHALL. 

